WO2015185861A1 - Utilisation de micropeptides pour favoriser la croissance des plantes - Google Patents
Utilisation de micropeptides pour favoriser la croissance des plantes Download PDFInfo
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- WO2015185861A1 WO2015185861A1 PCT/FR2015/051472 FR2015051472W WO2015185861A1 WO 2015185861 A1 WO2015185861 A1 WO 2015185861A1 FR 2015051472 W FR2015051472 W FR 2015051472W WO 2015185861 A1 WO2015185861 A1 WO 2015185861A1
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- Prior art keywords
- plant
- mipep
- mipep164a
- mipep165a
- mipep319a
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8216—Methods for controlling, regulating or enhancing expression of transgenes in plant cells
- C12N15/8218—Antisense, co-suppression, viral induced gene silencing [VIGS], post-transcriptional induced gene silencing [PTGS]
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/46—N-acyl derivatives
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/415—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from plants
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/146—Genetically Modified [GMO] plants, e.g. transgenic plants
Definitions
- the present invention relates to the use of micropeptides (peptides encoded by microRNAs or "miPEPs") to promote plant growth.
- micropeptides peptides encoded by microRNAs or "miPEPs"
- MicroRNAs are small non-coding RNAs, approximately 21 nucleotides after processing, that control the expression of target genes at the post-transcriptional level by degrading the target mRNA or inhibiting its translation.
- MiRs are especially found in plants. Genes targeted by miRs are often key genes in developmental processes. For example, miR164 targets genes of the CUC family (Blein et al., Science, 322 (5909): 1835-9, 2008). The miRl 64 family is thus involved in the development of meristems and especially in
- miR319s target transcription factors of the TCP family involved in cell growth (Nag et al, Proc Natl Acad Sci USA, 106 (52): 22534-9, 2009). The overexpression of miR319a thus leads to a leaf phenotype (phenotype Jaw, Palatnik et al, Nature,
- the miRs could thus, by their action of regulation of the expression of certain genes, represent a target of interest to control the growth of the plants, and in particular to favor the growth.
- RNA polymerase II This enzyme produces a primary transcript called pri-miR ", which is then matured by a protein complex containing in particular the Dicer type enzymes.
- This maturation leads first to the formation of a miR precursor called "pre-miR", having a secondary stem-loop structure containing the miR and its complementary miR * sequence.
- pre-miR a miR precursor
- the precursor is then matured resulting in the formation of a shorter double-stranded RNA containing miR and miR *.
- the miR is then supported by the RISC complex which cleaves the mRNA of the target gene or inhibits its translation.
- miRs and by extension their primary transcript, have always been considered, by their particular mode of action, as non-coding regulatory RNAs and producing no peptide.
- the inventors have recently demonstrated in the patent application FR 13/60727 the existence of micropeptides (or "miPEPs", microRNA encoded PEPtides) capable of modulating the accumulation of miRs.
- the present invention aims to provide new tools effective and ecological to promote plant growth.
- One of the aspects of the invention is to propose a new use of miPEPs to promote plant growth.
- Another aspect of the invention also relates to a new method of growing plants.
- Another aspect of the invention is to provide a composition of miPEPs for promoting plant growth.
- One of the other aspects of the invention is also to provide a transgenic plant and transgenic plant parts, and their method of production.
- One of the other aspects of the invention is also to provide organs, cells and seeds of transgenic plants.
- Another aspect of the invention is to provide ecologically modified plants.
- the invention thus relates to the use of a peptide for promoting the growth of a plant, said peptide being introduced into the plant, said peptide having an amino acid sequence comprising or consisting of a sequence identical to that of a miPEP naturally present in said plant,
- said miPEP naturally present in said plant being a peptide of 3 to 100 amino acids, in particular 4 to 100 amino acids, whose sequence is encoded by an open reading frame located on the primary transcript of a miR, said miPEP being capable of modulating the accumulation of said miR in said plant, which miR regulates the expression of at least one gene involved in the development of vegetative or reproductive parts of the plant, including roots, stems, leaves or flowers.
- the inventors have found that the use of peptides whose sequence comprises or consists of a sequence identical to that of miPEPs encoded on the primary miRs transcripts, makes it possible to promote the growth of plants.
- microRNA non-coding microRNA
- miR miR
- small RNA molecules of about 21 nucleotides, which are not translated and do not lead to a peptide or a protein.
- the miRs provide a function of regulation of certain genes via post-transcriptional mechanisms, for example via the RISC complex.
- the "primary transcript of miR” corresponds to the RNA molecule directly obtained from the transcription of the DNA molecule. Generally, this primary transcript undergoes one or more post-transcriptional modifications, which result, for example, in a particular structure of RNA or cleavage of certain RNA pallies by splicing phenomena, and which lead to the precursor form of miR or (" pre-miR "), then to the mature form of miR.
- the terms "micropeptides” and “miPEPs” are equivalent and may be used interchangeably. They define a peptide which is encoded by an open reading frame present on the primary transcript of a miR, and which is capable of modulating the accumulation of said miR. MiPEPs within the meaning of the present invention should not be understood as necessarily being small peptides, since "micro” does not correspond to the size of the peptide.
- the miPEPs are peptides:
- open reading frame or “ORF” (open reading frame) are equivalent and can be used for each other. They correspond to a nucleotide sequence in a DNA or RNA molecule that can potentially encode a peptide or a protein: said open reading frame starts with a start codon (the start codon generally coding for a methionine), followed by a codon series (each codon encoding an amino acid), and ends with a stop codon (the stop codon is not translated).
- start codon the start codon generally coding for a methionine
- codon series each codon encoding an amino acid
- stop codon the stop codon is not translated
- the ORFs may be specifically called "miORFs" when these are present on the miR primary transcripts.
- the miORFs as defined in the invention can have a size of 15 to 303 nucleotides. Since an amino acid is encoded by a codon of 3 nucleotides, the miORFs of 15 to 303 nucleotides encode miPEPS of 4 to 100 amino acids.
- the miORFs have a size of:
- a miPEP may also have a size of 3 amino acids.
- the same miPEP can be encoded by several nucleotide sequences.
- Such nucleotide sequences different from one another at least one nucleotide but coding the same peptide, are called "degenerate sequences”.
- the "plant” outfit generally refers to all or part of a plant whatever its stage of development (including the plant in the form of a plant). seed or young shoot), to one or more organs of the plant (such as leaves, roots, stem, flowers), to one or more cells of the plant, or to a cluster of cells of the plant. plant.
- the term "growth” refers to the development of all or part of a plant over time.
- the growth of the plant can thus be determined and quantified by monitoring observable evolutionary parameters for certain parts, cells or organs of the plant, such as leaves, roots, stems or flowers.
- the parameters making it possible to determine and quantify the growth of a plant may notably be:
- an acceleration of development (such as a larger leaf size for a plant at a given time compared to a reference plant)
- the invention has the advantage of being ecological, in comparison with the chemical methods conventionally used in the botanical industry or in agriculture, since miPEP is a peptide which is naturally present. in the plant.
- the invention also relates to the use of a miPEP introduced exogenously into a plant to promote growth,
- said exogenously introduced miPEP being a peptide comprising, or consisting of, a sequence identical to that of a miPEP naturally present in said plant, which naturally occurring miPEP is a peptide of 3 to 100 amino acids, in particular from 4 to 100 acids amino acids whose sequence is encoded by an open reading frame located 5 'to the primary transcript of a miR,
- said miPEP being capable of modulating the accumulation of said miR in said plant, which miR regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of the plant, in particular the roots, the stem, the leaves or flowers,
- the sum of the amount of said exogenously introduced miPEP and that of said naturally occurring miPEP being strictly greater than the amount of said naturally occurring miPEP.
- miPEP introduced exogenously refers to a miPEP introduced artificially into the plant, whether or not it exists naturally in the plant.
- miPEP exists naturally in the plant, it is a "endogenous miPEP".
- miPEP does not exist naturally in the plant, it is a "miPEP of exogenous origin".
- miPEP of exogenous origin When a "miPEP of exogenous origin" is introduced into the plant, it is then necessary to also introduce the corresponding miR and its primary transcript.
- the exogenously introduced miPEP may be either a peptide produced out of the plant (such as for example an isolated and / or purified peptide, a synthetic peptide or a peptide recombinant), a peptide produced in the plant following the unnatural introduction of a nucleic acid encoding said miPEP in said plant.
- the plant in which the miPEP has not been introduced has a basal amount of said miPEP, which coixespond with that of said naturally occurring miPEP.
- the use of a miPEP comprising, or consisting of, a sequence identical to that of said miPEP causes an increase in the total amount of miPEP, which modulates the accumulation of miR whose primary transcript contains the sequence encoding said miPEP.
- the introduced miPEP is found in the plant and its introduction has no impact on its stability.
- accumulation is meant the production of a molecule, such as a miR or a miPEP, in the cell.
- the "modulation of accumulation" of a molecule in a cell co-responds to a change in the amount of that molecule in the cell.
- the invention relates to the use as defined above, wherein the modulation of the accumulation of said miR is a decrease or increase in the accumulation of said miR, in particular an increase.
- a “decrease in miR accumulation” corresponds to a decrease in the amount of said molecule in the cell.
- an "increase in miR accumulation” is associated with an increase in the amount of said molecule in the cell.
- the invention relates to the use as defined above, wherein said gene, involved in the development of vegetative or vegetative parts of the plant, is selected from the group consisting of: NAC1 (Accession No. ° ATlG56010.1), NAC4 (Accession No. AT5G07680.1), NAC5 (Accession No. AT5G61430.1), CUC1 (Accession No. AT3G1517 ⁇ .1) and CUC2 (Accession No. AT5G53950.1) (accession numbers according to the database The ⁇ rabidopsis Information Resource "TAIR").
- the invention relates to the use as defined above, wherein said miRNA is niiR164a, in particular wherein said miR164a has a nucleotide sequence consisting of SEQ ID NO: 1.
- the invention relates to the use as defined above, wherein said miRNA is miR164a, in particular, wherein said miR164a has a nucleotide sequence consisting of SEQ ID NO: 1, and said gene, involved in the development of vegetative or reproducing parts of the plant is chosen from the group consisting of: NAC1 (Accession No. ATlG56010.1), NAC4 (Accession No. AT5G07680.1), NAC5 (Accession No. AT5G61430.1), CUC1 (Accession No. AT3G15170.1) and CUC2 (Accession No. AT5G53950.1) (accession numbers according to the database The Arabidopsis Information Resource "TAIR").
- the invention relates to the use as defined above, wherein said miR164a has a nucleotide sequence having at least 80% identity, preferably at least 90% identity, with the nucleotide sequence SEQ ID NO: 1.
- the invention relates to the use as defined above, wherein said miPEP is miPEP164a, in particular wherein said miPEP164a has an amino acid sequence consisting of SEQ ID NO: 2.
- the invention relates to the use as defined above, wherein said miPEP164a has an amino acid sequence having at least 80% identity, preferably at least 90% identity, with the amino acid sequence SEQ ID NO: 2.
- the invention relates to the use as defined above, wherein said gene, involved in the development of vegetative or vegetative parts of the plant, is selected from the group consisting of: REVOLUTA (Accession No. AT5G60690), PHABULOSA (Accession No. AT2G34710), PHAVOLUTA (Accession No. AT1G30490), ATHB-8 (Accession No. AT4G32880) and ATHB-15 (Accession No. AT1G52150) (accession numbers according to the database The Arabidopsis Information Resource "TAIR").
- said miRNA is miR165a, in particular wherein said miR165a has a nucleotide sequence consisting of SEQ ID NO: 5.
- the invention relates to the use as defined above, wherein said miRNA is miR165a, in particular, wherein said miR165a has a nucleotide sequence consisting of SEQ ID NO: 5, and said gene , involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of: REVOLUTA (Accession No. AT5G60690), PHABULOSA (Accession No. AT2G34710), PHAVOLUTA (Accession No. AT1G30490), ATHBS (Accession No. AT4G32880) and ATHB-15 (Accession No. AT1G52150) (accession numbers according to the database The Arabidopsis Information Resource "TAIR").
- REVOLUTA Accession No. AT5G60690
- PHABULOSA Accession No. AT2G34710
- PHAVOLUTA Accession No. AT1G30490
- ATHBS Accession No. AT4G32880
- the invention relates to the use as defined above, wherein said miR165a has a nucleotide sequence having at least 80% identity, preferably at least 90% identity, with the nucleotide sequence SEQ ID NO: 5.
- the invention relates to the use as defined above, wherein said miPEP is miPEP165a, in particular wherein said miPEP165a has an amino acid sequence consisting of sequence SEQ ID NO: 6.
- the invention relates to the use as defined above, wherein said miPEP165a has an amino acid sequence having at least 80% identity, preferably at least 90% identity, with the amino acid sequence SEQ ID NO: 6.
- the invention relates to the use as defined above, wherein said gene, involved in the development of vegetative or vegetative parts of the plant, is selected from the group consisting of: TCP3 (Accession No. ° ATlG53230.1) and TCP4 (Accession No. AT3Gl 5030.1) (accession numbers according to the database The Arabidopsis Information Resource "TAIR").
- TCP3 accesion No. ° ATlG53230.1
- TCP4 accesion No. AT3Gl 5030.1
- TAIR The Arabidopsis Information Resource
- the invention relates to the use as defined above, wherein said miRNA is miR319a, in particular, wherein said miR319a has a nucleotide sequence consisting of SEQ ID NO: 9.
- the invention relates to the use as defined above, wherein said miRNA is miR319a, in particular, wherein said miR319a has a nucleotide sequence consisting of SEQ ID NO: 9, and said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of: TCP 3 (Accession No. ATlG53230.1) and TCP4 (Accession No. AT3Gl 5030.1 (accession numbers according to the database The Ar bidopsis Information Resource "TIRE").
- the invention relates to the use as defined above, wherein said miR319a has a nucleotide sequence having at least 80% identity, preferably at least 90% identity, with the SEQ ID nucleotide sequence. NO: 9.
- the invention relates to the use as defined above, wherein said miPEP is miPEP319a, in particular wherein said miPEP319a has an amino acid sequence consisting of SEQ ID NO: 10.
- the invention relates to the use as defined above, wherein said miPEP319a has an amino acid sequence having at least 80% identity, preferably at least 90% identity, with the sequence of amino acids SEQ ID NO: 10.
- the invention relates to the use as defined above, wherein said plant is a cruciferous plant such as Arabidopsis thaliana, a leguminous plant such as Glycine max (soybean), Medicago truncatula and Medicago sativa (alfalfa) or a solanaceous plant such as Nicotiana benthamiana (tobacco), Solanum tiiberosicm (potato), Solanum lycopersicum (tomato) or Solanum melongena (eggplant).
- cruciferous plant such as Arabidopsis thaliana
- a leguminous plant such as Glycine max (soybean), Medicago truncatula and Medicago sativa (alfalfa) or a solanaceous plant
- Nicotiana benthamiana tobacco
- Solanum tiiberosicm potato
- Solanum lycopersicum
- the invention relates to the use as defined above, wherein said plant is a cruciferous plant. In one embodiment, the invention relates to the use as defined above, wherein said plant is a cruciferous plant and the miR is miR164a. In one embodiment, the invention relates to the use as defined above, wherein said plant is a cruciferous plant and the miR is miR165a.
- the invention relates to the use as defined above, wherein said plant is a cruciferous plant and the miR is miR319a.
- the invention relates to the use as defined above, wherein said plant is Arabidopsis thaliana.
- the invention relates to the use as defined above, for promoting the growth of an Arabidopsis thaliana plant, in which the miPEP 164a is introduced exogenously into said Arabidopsis thaliana plant, said miPEP164a being also naturally present in said plant Arabidopsis thaliana,
- said exogenously introduced miPEP164a being a peptide whose sequence comprises or consists of a sequence identical to that of said naturally occurring miPEP164a, said naturally occurring sequence of miPEP164a being encoded by an open reading frame located 5 'to the miR164a primary transcript , which miR164a regulates the expression of at least one gene involved in the development of vegetative or reproductive parts d! Arabidopsis thaliana,
- the invention relates to the use as defined above, for promoting the growth of an Arabidopsis thaliana plant, in which the miPEP165a is introduced exogenously into said Arabidopsis thaliana plant, said miPEP165a being also naturally present in said plant Arabidopsis thaliana,
- said exogenously introduced miPEP165a being a peptide whose sequence comprises or consists of a sequence identical to that of said naturally occurring miPEP165a, said naturally occurring sequence of miPEP165a being encoded by an open reading frame located at 5 'on the primary transcript of miR165a, which miR165a regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of Arabidopsis thaliana,
- the invention relates to the use as defined above, for promoting the growth of an Arabidopsis thaliana plant, in which the miPEP319a is introduced exogenously into said Arabidopsis thaliana plant, said miPEP319a being also naturally present in said plant Arabidopsis thaliana,
- said exogenously introduced miPEP319a being a peptide whose sequence comprises or consists of a sequence identical to that of said naturally occurring miPEP319a, said naturally occurring sequence of miPEP319a being encoded by an open reading frame located 5 'to the miR319a primary transcript which miR319a regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of Arabidopsis thaliana,
- the invention relates to the use as defined above, wherein said miPEP is introduced externally into the plant, preferably by watering, by spraying or by the addition of a fertilizer, a soil, a growing medium or a support in contact with the plant,
- the invention relates to the use as defined above, wherein said miPEP is introduced externally into a seed or a seed, preferably by watering, by spraying or by the addition of a fertilizer, potting soil, growing medium or substrate in contact with the seed or seed.
- the invention relates to the method as defined above, wherein said miPEP is used to treat the plant as a seed or seed. In one embodiment, the invention relates to the use as defined above, wherein said miPEP is introduced by watering and spraying.
- the invention relates to the use as defined above, wherein said miPEP is introduced by watering and adding a fertilizer.
- the invention relates to the use as defined above, wherein said miPEP is introduced by spraying and adding a fertilizer. In one embodiment, the invention relates to the use as defined above, wherein said miPEP is introduced by spraying, spraying and adding a fertilizer.
- the inventors have indeed unexpectedly found that it is possible to directly apply a composition comprising a miPEP on the plant to modulate the accumulation of miR corresponding in the plant, indicating that the miPEP is captured by the plant.
- the invention relates to the use as defined above, wherein the plant is treated with a composition comprising 10 "9 M to 10" 4 M of said miPEP, including 10 "9 M, 10" 8 M, 10 "7 M, 10" 6 M, 10 "5 M or 10" 4 M of said miPEP.
- compositions have a concentration of 10 -8 M to 10 -5 M for application by spraying or spraying on the plant.
- more or less concentrated compositions may be envisaged for treating the plant with the miPEP.
- more concentrated compositions comprising 10 "1 M to 10 " 3 M, especially 10 "2 M of miPEP, may be used in the case where the exogenously introduced miPEP is administered to the plant. by spreading.
- the solubility properties of the miPEPs are determined in particular by their amino acid composition.
- Hydrophilic miPEPs can be solubilized and packaged in aqueous solutions, such as water.
- the hydrophobic miPEPs can be solubilized and packaged in solvents, such as organic solvents.
- organic solvents are non-toxic solvents for plants in small amounts, that is to say that they have no deleterious effect on the development of the plant.
- the organic solvents may be chosen from acetonitrile and acetic acid.
- the miPEPs can also be solubilized and packaged in mixtures of organic solvents, such as, for example, a mixture of acetonitrile and acetic acid.
- the miPEPs may be solubilized in a solution comprising 50% acetonitrile, 10% acetic acid and 40% water (volume / volume / volume).
- miPEP164a is solubilized in water.
- miPEP164a is at a concentration of 10 -9 M to 10 -4 M in water.
- miPEP165a is solubilized in water.
- miPEP165a is at a concentration of 10 -9 M to 10 -4 M in water
- miPEP319a is solubilized in a solution comprising 50% acetonitrile, 10% acetic acid and 40 % water (volume / volume / volume).
- the miPEP319a solubilized in a solution comprising 50% acetonitrile, 10% acetic acid and 40% water (volume / volume / volume) is diluted to a concentration of 10 -9 M to 10 -4 M with water.
- the invention relates to the use as defined above, wherein said miPEP is introduced into the plant through a nucleic acid encoding said miPEP, said nucleic acid being introduced into the plant.
- the invention relates to the use as defined above, wherein the size of the stem is increased in the plant in which said miPEP has been introduced relative to the size of the stem of a identical plant of the same age in which no miPEP was introduced, or with respect to the size of the stem of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to the use as defined above, in which the number of leaves is increased in the plant in which said miPEP has been introduced in relation to the number of leaves of an identical plant and of the same age in which no miPEP was introduced, or in relation to the number of leaves of an identical plant and of the same age in which said miPEP was not introduced.
- the invention relates to the use as defined above, in which the size of the leaves is increased in the plant in which said miPEP has been introduced in relation to the size of the leaves of an identical plant. and the same age in which no miPEP was introduced, or in relation to the size of the leaves of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to the use as defined above, in which the number of roots is increased in the plant in which said miPEP has been introduced with respect to the number of roots of an identical plant and of the same age in which no miPEP has been introduced, or in relation to the number of roots of an identical plant of the same age in which said miPEP has not been introduced.
- the invention relates to the use as defined above, in which the length of the roots is increased in the plant in which said miPEP has been introduced with respect to the length of the roots of an identical plant. and of the same age in which no miPEP has been introduced, or with respect to the length of the roots of an identical plant of the same age in which said miPEP has not been introduced.
- the invention relates to the use as defined above, in which the number of flowers is increased in the plant in which said miPEP has been introduced in relation to the number of flowers of an identical plant and of the same age in which no miPEP has been introduced, or in relation to the number of flowers of an identical plant of the same age in which said miPEP has not been introduced.
- the invention relates to the use as defined above, in which the date of flowering is advanced in the plant in which said miPEP has been introduced with respect to the date of flowering of an identical plant. and of the same age in which no miPEP was introduced, or in relation to the flowering date of an identical plant of the same age in which said miPEP was not introduced.
- the invention relates to the use as defined above, wherein the size of the flower stalk is increased in the plant into which said miPEP has been introduced in relation to the size of the flower stalk. an identical plant of the same age in which no miPEP has been introduced, or in relation to the size of the flower stalk of an identical plant of the same age in which said miPEP has not been introduced.
- Increasing parameters to determine and quantify growth in the plant in which the miPEP was introduced is preferably demonstrated by comparison with an identical plant (that is to say a plant of the same species and / or variety), of the same age and cultivated under the same conditions but in which no miPEP was introduced .
- the invention also relates to the use of a miPEP introduced exogenously into a plant to promote growth,
- said miPEP being encoded by the primary transcript, artificially introduced into the plant, of a miR
- said primary transcript, said miR and said miPEP being naturally absent in the plant, said miPEP being capable of modulating the accumulation of said miR in said plant, which miR regulates the expression of at least one gene involved in the development of the vegetative parts or reproducing the plant, including roots, stems, leaves or flowers.
- said primary transcript of miR, miR and said miPEP are introduced into the plant using a vector.
- the invention relates to a method for promoting the growth of a plant, comprising a step of introducing a miPEP into a plant exogenously, said miPEP also occurring naturally in said plant,
- said miPEP introduced exogenously being a peptide of 3 to 100 amino acids, in particular from 4 to 100 amino acids, the sequence of which comprises or consists of a sequence identical to that of said naturally occurring miPEP, which sequence of the naturally occurring miPEP is encoded by a open reading frame located 5 'on the primary transcript of u miR, said miPEP being capable of modulating the accumulation of said miR, which miR regulates the expression of at least one gene involved in the development of vegetative or reproducing parts of the plant, including roots, stems, leaves or flowers,
- the sum of the amount of said exogenously introduced miPEP and that of said naturally occurring miPEP being strictly greater than the amount of said naturally occurring miPEP.
- the invention relates to a method as defined above, wherein said gene, involved in the development of vegetative or vegetative parts of the plant, is selected from the group consisting of: NAC1 (Accession No. ATlG56010.1), NAC4 (Accession No. AT5G07680.1), NAC5 (Accession No. AT5G61430.1), CUC1 (Accession No. AT3G15170.1) and CUC2 (Accession No. AT5G53950.1).
- NAC1 Accession No. ATlG56010.1
- NAC4 Accession No. AT5G07680.1
- NAC5 Accession No. AT5G61430.1
- CUC1 Accession No. AT3G15170.1
- CUC2 Accession No. AT5G53950.
- the invention relates to a method as defined above, wherein said miAR is miR164a, in particular wherein said miR164a has a nucleotide sequence consisting of SEQ ID NO: 1.
- the invention relates to a method as defined above, wherein said miRNA is miR 164a, in particular, wherein said miR164a has a nucleotide sequence consisting of SEQ ID NO: 1, and said gene , involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of; NAC1 (Accession ⁇ ° ⁇ 1 ⁇ 56010.1), NAC4 (Accession No. AT5G07680.1), NAC5 (Accession No. AT5G61430.1), CUC1 (Accession No. AT3G15170.1) and CUC2 (Accession No. AT5G53950.1).
- NAC1 Accession ⁇ ° ⁇ 1 ⁇ 56010.1
- NAC4 Accession No. AT5G07680.1
- NAC5 Accession No. AT5G61430.1
- CUC1 Accession No. AT3G15170.1
- CUC2 Accession No. AT5G53950.
- the invention relates to a method as defined above, wherein said miPEP is miPEP164a, in particular wherein said miPEP 164a has an amino acid sequence consisting of SEQ ID NO: 2.
- said gene involved in the development of vegetative or vegetative parts of the plant, is selected from the group consisting of: REVOLUTA (Accession No. AT5G60690), PHABUWSA (Accession No. AT2G34710), PHAVOLUTA (Accession No. AT1G30490), ATHB-8 (Accession No. AT4G32880) and ATTH-15 (Accession No. AT1G52150).
- the invention relates to a method as defined above, wherein said miRNA is miR165a, in particular wherein said miR165a has a nucleotide sequence consisting of SEQ ID NO: 5.
- the invention relates to a method as defined above, wherein said miRNA is miR165a, in particular, wherein said miR165a has a nucleotide sequence consisting of SEQ ID NO: 5, and said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of: REVOLUTA (Accession No. AT5G60690), PHABUWSA (Accession No. AT2G34710), PHAVOLUTA (Accession No. AT1G30490), ATHB-8 (Accession No. AT4G32880) cXATHB-15 (Accession No. ATIG52150).
- REVOLUTA Accession No. AT5G60690
- PHABUWSA Accession No. AT2G34710
- PHAVOLUTA Accession No. AT1G30490
- ATHB-8 Accession No. AT4G32880
- cXATHB-15 Accession No. ATIG52150.
- the invention relates to a method as defined above, wherein said miPEP is miPEP165a, in particular wherein said miPEP165a has an amino acid sequence consisting of SEQ ID NO: 6.
- the invention relates to a method as defined above, wherein said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of: TCP3 (Accession No. ATlG53230.1) and TCP 4 (Accession No. AT3G15030.1).
- the invention relates to a method as defined above, wherein said miRNA is miR319a, in particular wherein said miR319a has a nucleotide sequence consisting of SEQ ID NO: 9.
- the invention relates to a method as defined above, wherein said miRNA is miR319a, in particular, wherein said miR319a has a nucleotide sequence consisting of SEQ ID NO: 9, and said gene, involved in the development vegetative or reproductive parts of the plant, is selected from the group consisting of: TCP3 (Accession No. ATl G53230.1) and TCP4 (Accession No. AT3Gl 5030.1).
- the invention relates to a method as defined above, wherein said miPEP is miPEP319a, in particular wherein said miPEP319a has an amino acid sequence consisting of SEQ ID NO: 10.
- the invention relates to a method as defined above, wherein said plant is a cruciferous plant such as Arabidopsis thaliano, a leguminous plant such as Glycine max (soybean), Medicago truncatula and Medicago saliva ( alfalfa) or a solanaceous plant such as Nicotiana benthamiana (tobacco), Solanum tuberosum (potato), Solanum fycopersicum (tomato) or Solanum melongena (eggplant).
- a cruciferous plant such as Arabidopsis thaliano
- a leguminous plant such as Glycine max (soybean), Medicago truncatula and Medicago saliva ( alfalfa) or a solanaceous plant
- Nicotiana benthamiana tobacco
- Solanum tuberosum potato
- Solanum fycopersicum tomato
- the invention relates to a method as defined above, wherein said plant is a cruciferous plant.
- the invention relates to a method as defined above, wherein said plant is Arabidopsis thaliana.
- the invention relates to a method as defined above, wherein said plant is a cruciferous plant and the miR is miR164a.
- the invention relates to a method as defined above, wherein said plant is a cruciferous plant and the miR is miR165a. In one embodiment, the invention relates to a method as defined above, wherein said plant is a cruciferous plant and the miR is miR319a.
- the invention relates to a method as defined above, for promoting the growth of an Arabidopsis thaliana plant, in which the miPEP164a is introduced exogenously into said Arabidopsis thaliana plant, said miPEP164a being also naturally occurring. present in said plant Arabidopsis thaliana,
- said miPEP164a introduced exogenously being a peptide comprising or consisting of a sequence identical to that of said miPEP164a naturally present, which miPEP164a naturally present is a peptide of 3 to 100, in particular from 4 to 100 amino acids, whose sequence is coded by a open reading frame located 5 'on the primary transcript of miRl 64a,
- said miPEP164a being capable of increasing the accumulation of said miRl 64a, which miRl 64a regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of Arabidopsis thaliana,
- the invention relates to a method as defined above, for promoting the growth of an Arabidopsis thaliana plant, in which the miPEP165a is introduced exogenously into said Arabidopsis thaliana plant, said miPEP165a being also naturally occurring. present in said plant Arabidopsis thaliana,
- said exogenously introduced miPEP165a being a peptide comprising or consisting of a sequence identical to that of said naturally occurring miPEP165a, which naturally occurring miPEP165a is a peptide of 3 to 100 amino acids, in particular from 4 to 100 amino acids whose sequence is coded by an open reading frame located 5 'on the primary transcript of miRl 65a,
- said miPEP165a being capable of increasing the accumulation of said miRl 65a, which miRl 65a regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of Arabidopsis thaliana,
- the invention relates to a method as defined above, for promoting the growth of a plant Arabidopsis lha ⁇ ana, wherein the miPEP319a is introduced exogenously into said plant Arabidopsis thaliana, said miPEP319a being also naturally present in said plant Arabidopsis thaliana,
- said exogenously introduced miPEP319a being a peptide comprising or consisting of a sequence identical to that of said naturally occurring miPEP319a, which naturally occurring miPEP319a is a peptide of 3 to 100 amino acids, in particular from 4 to 100 amino acids whose sequence is coded by an open reading frame located 5 'on the primary transcript of mid 319a,
- said miPEP319a being capable of increasing the accumulation of said miR31a, which miR319a regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of Arabidopsis thaliana,
- the sum of the amount of said exogenously introduced miPEP319a and that of said naturally occurring miPEP319a being strictly greater than the amount of said naturally occurring miPEP319a.
- the invention relates to a method as defined above, wherein said miPEP is introduced externally into the plant, preferably by watering, by spraying or by the addition of a fertilizer. a soil, a growing medium or a support in contact with the plant.
- the invention relates to a method as defined above, wherein said miPEP is introduced externally into the seed or seed, preferably by watering, spraying or adding a fertilizer, potting soil, growing medium or substrate in contact with the seed or seed.
- the invention relates to the method as defined above, wherein said miPEP is used to treat the plant as a seed or seed.
- the invention relates to a method as defined above wherein said miPEP is administered to the plant in the form of a composition comprising 10 "9 M to 10 -4 M of said miPEP, especially 10 "9 , 10 " 8 , 10 "7 , 10 " 6 , 10 “s or 10 " 4 M of said miPEP.
- the invention relates to a method as defined above, wherein said miPEP is introduced into the plant via a nucleic acid encoding said miPEP, said nucleic acid being introduced into the plant.
- the invention relates to a method as defined above, in which the size of the stem is increased in the plant into which said miPEP has been introduced in relation to the size of the stem of a plant. identical and of the same age in which no miPEP was introduced, or in relation to the size of the stem of an identical plant and of the same age in which said miPEP was not introduced.
- the invention relates to a method as defined above, in which the number of leaves is increased in the plant in which said miPEP has been introduced relative to the number of leaves of an identical plant and of same age in which no miPEP was introduced, or in relation to the number of leaves of an identical plant and of the same age in which said miPEP was not introduced.
- the invention relates to a method as defined above, wherein the leaf size is increased in the plant in which said miPEP has been introduced relative to the leaf size of an identical plant and the same age in which no miPEP was introduced, or in relation to the size of the leaves of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to a method as defined above, in which the number of roots is increased in the plant in which said miPEP has been introduced relative to the number of roots of an identical plant and of same age in which no miPEP was introduced, or in relation to the number of roots of an identical plant of the same age in which said miPEP was not introduced.
- the invention relates to a method as defined above, in which the length of the roots is increased in the plant in which said miPEP has been introduced with respect to the length of the roots of an identical plant and of the same age in which no miPEP was introduced, or in relation to the length of the roots of an identical plant of the same age in which said miPEP was not introduced.
- the invention relates to a method as defined above, in which the number of flowers is increased in the plant in which said miPEP has been introduced with respect to the number of flowers of an identical plant and of same age in which no miPEP was introduced, or in relation to the number of flowers of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to a method as defined above, in which the date of flowering is advanced in the plant into which said miPEP has been introduced with respect to the date of flowering of an identical plant and the same age in which no miPEP was introduced, or in relation to the date of flowering of an identical plant of the same age in which said miPEP was not introduced.
- the invention relates to a method as defined above, in which the size of the flower stalk is increased in the plant into which said miPEP has been introduced in relation to the size of the flower stalk. an identical plant of the same age in which no miPEP has been introduced, or in relation to the size of the flower stalk of an identical plant of the same age in which said miPEP has not been introduced.
- the invention relates to a plant into which a miPEP has been introduced according to the use or method for promoting plant growth described above.
- the invention relates to a method for producing a transgenic plant comprising:
- step b) a step of cultivating the plant, or at least one cell of said plant, obtained in step a) under conditions making it possible to obtain a transgenic plant.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said transgenic plant obtained in step b) has improved growth over an identical plant in which said nucleic acid has not been introduced.
- the invention relates to a method for producing a transgenic plant as defined above, wherein step a) is carried out using a vector containing said nucleic acid, preferably a plasmid. In one embodiment, the invention relates to a method of producing a transgenic plant as defined above, wherein said nucleic acid does not comprise the complete sequence of said miR.
- the invention relates to a method for producing a transgenic plant as defined above, wherein the expression of said nucleic acid of step a) is placed under the control of a strong promoter. preferably a strong constitutive promoter such as the 35S promoter.
- the invention relates to a method of producing a transgenic plant as defined above, wherein said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of in: NAC1 (Accession ⁇ AT1GS010O1), NAC4 (Accession No. AT5G07680.1), NAC5 (Accession No. AT5G61430.1), CUCI (Accession No. AT3G15170.1) and CUC2 (Accession No. AT5G53950.1) .
- the invention relates to a method of producing a transgenic plant as defined above, wherein said miRNA is miR164a, in particular wherein said miR164a has a nucleotide sequence consisting of SEQ ID NO : 1.
- the invention relates to a method of producing a transgenic plant as defined above, wherein said miRNA is miR164a, in particular wherein said miR164a has a nucleotide sequence consisting of SEQ ID NO : 1, and said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of: NAC1 (Accession No. ATlG56010.1), NAC4 (Accession No. AT5G07680.1), NAC5 ( Accession No.
- the invention relates to a method of producing a transgenic plant as defined above, wherein said miPEP is miPEP164a, in particular wherein said miPEP164a has an amino acid sequence consisting of SEQ ID NO: 2.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said nucleic acid introduced in step a) comprises a nucleotide sequence consisting of SEQ ID NO: 3.
- the invention relates to a method of producing a transgenic plant as defined above, wherein said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of in: REVOLUTA (Accession No. AT5G60690), PHABULOSA (Accession No. AT2G34710), PHAVOLUTA (Accession No. AT1G30490), ⁇ -8 (Accession No. AT4G32880), ATHB-15 (Accession No. AT1G52150).
- REVOLUTA Accession No. AT5G60690
- PHABULOSA Accession No. AT2G34710
- PHAVOLUTA Accession No. AT1G30490
- ⁇ -8 Accession No. AT4G32880
- ATHB-15 Accession No. AT1G52150.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said miRNA is miR165a, in particular wherein said miR165a has a nucleotide sequence consisting of SEQ ID NO : 5.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said miRNA is miR165a, in particular wherein said miR165a has a nucleotide sequence consisting of SEQ ID NO : 5, and said gene, involved in the development of vegetative parts or Reproductive plant, is selected from the group consisting of: REVOLUTA (Accession No. AT5G60690), PHABULOSA (Accession No. AT2G34710), PHAVOLUTA (Accession No. AT1G30490), ATHB-8 (Accession No. AT4G32880) and ATHB-15 (Accession No. AT1G52150).
- REVOLUTA Accession No. AT5G60690
- PHABULOSA Accession No. AT2G34710
- PHAVOLUTA Accession No. AT1G30490
- ATHB-8 Accession No. AT4G32880
- ATHB-15 Accession No. AT1G52150
- the invention relates to a method for producing a transgenic plant as defined above, wherein said miPEP is miPEP165a, in particular wherein said miPEP165a has an amino acid sequence consisting of SEQ ID NO: 6.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said nucleic acid introduced in step a) comprises a nucleotide sequence consisting of SEQ ID NO: 7.
- the invention relates to a method of producing a transgenic plant as defined above, wherein said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of in: TCP3 (Accession No. ATlG53230.1) and TCP4 (Accession No. AT3Gl 5030.1).
- the invention relates to a method for producing a transgenic plant as defined above, wherein said miRNA is miR319a, in particular wherein said miR319a has a nucleotide sequence consisting of SEQ ID NO : 9.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said miRNA is miR319a, in particular wherein said miR319a has a nucleotide sequence consisting of SEQ ID NO : 9, and said gene, involved in the development of vegetative or reproductive parts of the plant, is selected from the group consisting of: TCP 3 (Accession No. ATlG53230.1) and TCP4 (Accession No. AT3Gl 5030.1).
- the invention relates to a method for producing a transgenic plant as defined above, wherein said miPEP is miPEP319a, in wherein said miPEP319a has an amino acid sequence of SEQ ID NO: 10.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said nucleic acid introduced in step a) comprises a nucleotide sequence consisting of SEQ ID NO: 11.
- the invention relates to a process for producing a transgenic plant as defined above, wherein said transgenic plant is a cruciferous plant such as Arabidopsis thaliana, a leguminous plant such as Glycine max (soybean). ), Medicago truncatula and Medicago sativa (alfalfa) or a solanaceous plant such as Nicotiana benthamiana (tobacco), Soianum tuberosum (potato), Solanum lycopersicum (tomato) or Solanum melongena (eggplant).
- the invention relates to a method for producing a transgenic plant as defined above, wherein said transgenic plant is a cruciferous plant.
- the invention relates to a method for producing a transgenic plant as defined above, wherein said transgenic plant is Arabidopsis thaliana.
- the invention relates to a method for producing a transgenic plant as defined above, comprising:
- the miPEP164a also being naturally present in said Arabidopsis thaliana plant, said naturally occurring miPEP being a peptide whose sequence is encoded by an open reading frame located at 5 'on the primary miR164a transcript, said miPEP164a being able to modulate the accumulation said miR164, which miR164a regulates the expression of at least one gene involved in the development of vegetative or reproductive parts & Arabidopsis thaliana, and b) a step of culturing the plant, or at least one cell of said plant, obtained in step a) under conditions for obtaining a transgenic Arabidopsis thaliana plant.
- the invention relates to a method for producing a transgenic plant as defined above, comprising:
- said miPEP165a also being naturally present in said Arabidopsis thaliana plant, said naturally occurring miPEP being a peptide whose sequence is encoded by an open reading frame situated at 5 'on the miR165a primary transcript, said miPEP165a being able to modulate the accumulation said miR165a, which miR165a regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of Arabidopsis thaliana, and
- step b) a step of culturing the plant, or at least one cell of said plant, obtained in step a) under conditions for obtaining a transgenic Arabidopsis thaliana plant.
- the invention relates to a method for producing a transgenic plant as defined above, comprising:
- said miPEP319a also being naturally present in said Arabidopsis thaliana plant, said naturally occurring miPEP being a peptide whose sequence is encoded by an open reading frame situated at 5 'on the primary miR319a transcript, said miPEP319a being able to modulate the accumulation of said miR319a, which miR319a regulates the expression of at least one gene involved in the development of the vegetative or reproductive parts of Arabidopsis thaliana, and b) a step of culturing the plant, or at least one cell of said plant, obtained in step a) under conditions for obtaining a transgenic Arabidopsis thaliana plant.
- the invention relates to a production method as defined above, wherein said miPEP is introduced into the plant via a nucleic acid encoding said miPEP, said nucleic acid being introduced into the plant. .
- the invention relates to a method for producing a transgenic plant as defined above, wherein the size of the stem is increased in the plant into which said miPEP has been introduced in relation to the size. the stem of an identical plant of the same age in which no miPEP has been introduced, or in relation to the size of the stem of an identical plant of the same age in which said miPEP was not introduced.
- the invention relates to a method for producing a transgenic plant as defined above, wherein the number of leaves is increased in the plant in which said miPEP has been introduced in relation to the number of leaves. an identical plant and the same age in which no miPEP was introduced, or in relation to the number of leaves of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to a process for producing a transgenic plant as defined above, wherein leaf size is increased in the plant in which said miPEP has been introduced relative to the size of the plants. leaves of an identical plant of the same age in which no miPEP was introduced, or in relation to the size of the leaves of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to a method for producing a transgenic plant as defined above, wherein the number of roots is increased in the plant into which said miPEP has been introduced in relation to the number of roots. of an identical plant of the same age in which no miPEP has been introduced, or ratio to the number of roots of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to a method for producing a transgenic plant as defined above, wherein the length of the roots is increased in the plant into which said miPEP has been introduced relative to the length of the plants. roots of an identical plant of the same age in which no miPEP was introduced, or in relation to the length of the roots of an identical plant of the same age in which said miPEP was not introduced.
- the invention relates to a method for producing a transgenic plant as defined above, wherein the number of flowers is increased in the plant into which said miPEP has been introduced in relation to the number of flowers. an identical plant and the same age in which no miPEP was introduced, or compared to the number of flowers of an identical plant and the same age in which said miPEP was not introduced.
- the invention relates to a method for producing a transgenic plant as defined above, wherein the flowering date is advanced in the plant into which said miPEP has been introduced with respect to the date of flowering. flowering of an identical plant of the same age in which no miPEP was introduced, or in relation to the flowering date of an identical plant of the same age in which said miPEP was not introduced.
- the invention relates to a method for producing a transgenic plant as defined above, wherein the size of the flower stalk is increased in the plant in which said miPEP has been introduced relative to the size of the floral stem of an identical plant of the same age in which no miPEP has been introduced, or compared to the size of the flower stalk of an identical plant of the same age in which said miPEP does not has not been introduced.
- the invention also relates to a transgenic plant as obtained by the production method as defined above.
- the invention relates to a plant in which a miPEP has been introduced according to the use or the method for promoting the development of vegetative or reproductive parts of the plant.
- the invention relates to a composition, particularly a phytosanitary composition, comprising miPEP164a as active substance, said miPEP164a preferably consisting of SEQ ID NO: 1.
- the invention relates to a composition, particularly a phytosanitary composition, comprising miPEP165a as active substance, said miPEP165a preferably consisting of SEQ ID NO: 5.
- the invention relates to a composition, in particular a phytosanitary composition, comprising miPEP319a as active substance, said miPEP319a preferably consisting of SEQ ID NO: 9.
- the invention relates to a composition as defined above, wherein said miPEP 164a is at a concentration of 10 "9 M to 10" 4 M, in particular 10 "9, 10" 8, 10 " 7, 10 "6, 10" s or LO 4 M.
- a composition as defined above has a concentration of 10 -8 M to 10 -5 M for application by spraying or spraying on the plant.
- more or less concentrated compositions can be envisaged to treat the plant with the miPEP.
- more concentrated compositions comprising 10 " M to 10 " 3 M, especially 10 " M of miPEP, may be used in the case where the exogenously introduced miPEP is administered to the plant.
- the invention relates to a composition as defined above, further comprising an excipient, a diluent or a solvent.
- the invention relates to a composition as defined above formulated so as to form a mix.
- the invention relates to a composition comprising in combination a seed quantity of a plant and an amount of a peptide whose sequence comprises or consists of a sequence identical to that of a miPEP naturally present in said plant. .
- the invention relates to a composition
- a composition comprising in combination a seed quantity of a cruciferous plant, in particular A. thaliana, and an amount of a peptide whose sequence comprises or consists of a sequence identical to that of the miPEP164a.
- the invention relates to a composition
- a composition comprising in combination a seed quantity of a cruciferous plant, in particular A. thaliana, and an amount of a peptide whose sequence comprises or consists of a sequence identical to that of the miPEP165a.
- the invention relates to a composition
- a composition comprising in combination a seed quantity of a cruciferous plant, in particular A. thaliana, and an amount of a peptide whose sequence comprises or consists of a sequence identical to that of the miPEP319a.
- the invention relates to a composition as defined above, further comprising an excipient, a diluent or a solvent.
- the invention relates to a composition as defined above formulated to form a coated seed.
- the coating can be carried out according to the methods conventionally used in the food industry and can be obtained by using a material capable of breaking down in a solvent or in the earth, such as a binder or clay.
- the coating may be used for example to confer particular properties on a composition of miPEP, or on a seed composition in combination with a miPEP.
- the invention relates to a method for producing a recombinant peptide, the sequence of which comprises or consists of a sequence identical to that of a miPEP as defined above, comprising a step of transforming a organism with an expression vector encoding said recombinant peptide.
- said organism is selected from the group consisting of bacteria, yeasts, fungi (other than yeasts), animal cells, plants and animals. In one embodiment, said organism is Escherichia coli.
- the invention relates to a protocol for producing a recombinant peptide as defined above, comprising the following steps:
- nucleic acid encoding said recombinant peptide is linked to a nucleic acid
- a label such as GST
- the expression vector containing said nucleic acid encoding said recombinant peptide is introduced into the E. coli bacterium,
- the E. coli bacterium containing the expression vector is cultured in LB medium preferably up to an OD of between 0.2 and 0.4,
- the production of the recombinant peptide is induced with IPTG, preferably for 4 to 5 hours,
- the E. coli bacteria are centrifuged and lysed
- said recombinant peptide is purified on a glutathione sepharose affinity column
- the invention relates to an antibody specifically recognizing miPEP164a, particularly said miPEP164a consisting of SEQ ID NO: 2.
- the invention relates to an antibody specifically recognizing miPEP165a, particularly said miPEP165a consisting of SEQ ID NO: 6.
- the invention relates to an antibody specifically recognizing miPEP319a, particularly said miPEP319a consisting of SEQ ID NO: 10.
- Such an antibody can be obtained from a method known to those skilled in the art, such as for example by injecting said miPEP164a to a non-human animal to trigger an immunization reaction and the production of antibodies by said animal.
- the invention in another aspect, relates to a method for immunolocaising miPEP164a comprising a step of labeling a biological sample of a plant with an antibody specifically recognizing said miPEP 164a.
- the invention in another aspect, relates to a method for immunolocaising miPEP165a comprising a step of labeling a biological sample of a plant with an antibody specifically recognizing said miPEP165a.
- the invention in another aspect, relates to a method for immunolocaising miPEP319a comprising a step of labeling a biological sample of a plant with an antibody specifically recognizing said miPEP319a.
- the sequences of miPEP164a, its open reading frame, miR164a and primary transcripts of miR164a in Arabidopsis thaliana are shown in Table 1.
- miR164a uggagaagcagggcacgugca SEQ ID NO: 1 miPEP164a MPSWHGMVLLPYVKHTHASTHTHTHNIYGC SEQ ID NO: 2
- ACELVFH miORF164a ATGCCATCATGGCATGGTATGGTTCTTTTGC SEQ ID NO: 3
- miPEP16a The sequences of miPEP16a, from its open reading frame, miR164a and miR165 primary transcripts in Arabidopsis thaliana are shown in Table 2.
- Pages 38 to 54 correspond to excerpts from the French patent application No. FR 13/60727 filed October 31, 2013 for "Micropeptides and their use to modulate gene expression"
- mlcropeptides peptides encoded by microRNAs or "miPEPs"
- miPEPs microRNAs
- MicroRNAs are small non - coding RNAs, approximately 21 nucleotides after processing, that control the expression of target genes at the post - transcriptional level by degrading the target mRNA or inhibiting its translation. MiRs are found in plants and animals.
- Target genes are often key genes in developmental processes. For example, they code for transcription factors or proteasome proteins.
- miRs The regulation of the expression of miRs is very little known, but it is known in particular that it involves, like most coding genes, an RNA polymerase II: this enzyme produces a primary transcript, called “pri "miR”, which is then matured with a protein complex containing especially Dicer type enzymes.
- This maturation leads first to the formation of a miR precursor called “pre-miR”, having a secondary stem-loop structure containing miR and its complementary miR * sequence.
- pre-miR a miR precursor having a secondary stem-loop structure containing miR and its complementary miR * sequence.
- the precursor is then matured resulting in the formation of a shorter double-stranded RNA containing miR and miR *.
- the miR is then supported by the RISC complex which cleaves the mRNA of the target gene or inhibits its translation.
- uORFs small open reading frames
- 5 'UTR 5' UnTranslated Region
- ORFs small open reading frames
- uORFs can act as a regulator of translation, mainly in cis, by modulating the binding and the speed of ribosomes on the mRNA, but also in trans by a mechanism still unknown, via peptides encoded by said uORFs (Combier et al, Gene Dev, 22: 1549-1559, 2008).
- uORFS are present upstream of coding genes.
- One of the aspects of the subject of the application FR 13 60727 is to propose peptides capable of modulating the expression of microRNAs.
- Another aspect of the subject of the application FR 13 60727 is to propose a means for modulating the expression of one or more target genes of a microRNA.
- the object of the application FR 13 60727 has the advantage of allowing easier and more efficient control of the expression of genes targeted by microRNAs, using a means other than the microRNA.
- the subject of the application FR 13 60727 thus relates to a method for the detection and identification of a micropeptide (miPEP) encoded by a nucleotide sequence contained in the sequence of the primary transcript of a microRNA,
- microRNA The accumulation of said microRNA in a specific eukaryotic cell expressing said microRNA
- microRNA in the presence of a peptide encoded by an identical or degenerate nucleotide sequence relative to that of said open reading frame, said peptide being present in the cell independently of the transcription of the primary transcript of said microRNA, and The accumulation of said microRNA in a eukaryotic cell of the same type as the aforementioned determined eukaryotic cell expressing said microRNA,
- modulation of the accumulation of said microRNA in the presence of said peptide with respect to accumulation of said microRNA in the absence of said peptide indicates the existence of a micropeptide encoded by said open reading frame.
- the method for detecting and identifying a micropeptide thus consists in detecting on the primary transcript of a microRNA the existence of an open reading frame potentially encoding a peptide.
- the second step makes it possible to characterize said peptide, that is to say to determine if said peptide corresponds to a peptide actually produced in the cell, by seeking an effect of said peptide on the accumulation of said microRNA.
- a large amount of peptide is introduced into a first cell expressing said microRNA.
- the accumulation of the microRNA in this first cell is then measured and compared with the accumulation of the microRNA in a second cell identical to the first, but not containing said peptide.
- Observing a variation in the amounts of microRNA between the cells in the presence and absence of the peptide thus indicates (i) that there is a peptide encoded on the primary transcript of said microRNA, (ii) that the sequence of this peptide is encoded by the open reading frame identified on the primary transcript of said microRNA, and (iii) said peptide acts on the accumulation of said microRNA.
- microRNA microRNA non-coding
- miR miRNA non-coding
- microRNAs function to regulate certain genes via post-transcriptional mechanisms, for example via the RISC complex.
- the primary transcript of the microRNA or "pri-miR” corresponds to the RNA molecule directly obtained from the transcription of the DNA molecule. Generally, this primary transcript undergoes one or more post-transcriptional modifications, which result, for example, in a particular structure of the RNA or a cleavage of certain portions of ⁇ RNA by splicing phenomena, and which lead to the precursor form of the microRNA. or "pre-miR", then to the mature form of microRNA or "miR".
- micropeptides and "iPEPs” are equivalent and may be used interchangeably. They define a peptide which is encoded by an open reading frame present on the primary transcript of a microRNA, and which is capable of modulating the accumulation of said microRNA. Micropeptides within the meaning of the application FR 13 60727 should not be understood as necessarily being small peptides, since "micro” does not correspond to the size of the peptide.
- the same micropeptide can be encoded by several nucleotide sequences.
- Such nucleotide sequences different from one another at least one nudeotide but coding the same peptide, are called "degenerate sequences”.
- open reading frame or "ORF” (open reading frame) are equivalent and may be used interchangeably. They correspond to a nucleotide sequence in a DNA or RNA molecule that can potentially encode a peptide or a protein: said open reading frame starts with a start codon, followed by a series of codons, and ends with a stop codon.
- the ORFs may be specifically called “miORFs” when they are present on the primary microRNA transcripts
- "accumulation” means the production of a molecule, such as a microRNA or a micropeptide, in the cell.
- the "modulation" of the accumulation of a molecule in a cell corresponds to a modification of the quantity of this molecule present in the cell.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, in which the modulation of the accumulation of said microRNA is a decrease or a decrease. increasing the accumulation of said microRNA, in particular an increase.
- a “decrease in accumulation” corresponds to a decrease in the amount of said molecule in the cell.
- an "increase in accumulation” corresponds to an increase in the amount of said molecule in the cell.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, in which the modulation of the accumulation of said microRNA is an increase of the accumulation of said microRNA.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, in which the presence of said peptide in the cell results:
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, in which the said open reading frame of step a) is contained in the 5 'or 3' portion of said primary microRNA transcript, preferably in the 5 'portion.
- the 5 'or 3' portions of the primary microRNA transcript correspond to the terminal portions of the RNA molecule that are cleaved during microRNA processing.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, wherein said microRNA is present in a wild plant cell.
- a wild plant cell corresponds to a plant cell which has not been genetically modified by man.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, in which said determined eukaryotic cell, and said eukaryotic cell of the same type as the above determined eukaryotic cell, used in step b, are plant cells, preferably Medicago truncatula or Arabidopsis thaliana cells.
- the cellular model in which the miORF has been identified and that in which the effect of the peptide on the miR is demonstrated are different.
- the cellular model used to observe an effect of the peptide is the same as that in which the primary transcript of said microRNA was isolated.
- the determined eukaryotic cells naturally contain said microRNA and only the peptide to be tested must be introduced into these cells.
- said microRNA is called "endogenous origin" because it naturally exists in the cells. Nevertheless, in one cell, other copies of a microRNA of endogenous origin may be added, for example by introducing into the cell a vector encoding said microRNA of endogenous origin.
- the cellular model used to observe an effect of the peptide is different from that in which the primary transcript of said microRNA was isolated.
- the determined eukaryotic cells contain neither the microRNA nor the peptide to be tested. These two elements must therefore be introduced into these cells.
- said microRNA is called "exogenous origin" because it does not exist naturally in cells.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, wherein said microRNA is of endogenous origin in said eukaryotic cell and in said eukaryotic cell of the same type as said eukaryotic cell determined, used in step b).
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above in which said microRNA is of exogenous origin in said eukaryotic cell and in said eukaryotic cell of the same type as the above determined eukaryotic cell, used in step b), said eukaryotic cells containing a vector for the expression of said microRNA.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, in which the accumulation of said microRNA is determined by implementing an RT -PCR quantitative or a Northern blot.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a miPEP as defined above, in which 5 accumulating said microRNA is determined by implementing a microarray or RNA.
- the accumulation of said microRNA can be determined using molecular biology techniques for assaying specific nucleic acid molecules.
- the subject of the application FR 13 60727 also relates to a method for detecting and identifying a microRNA whose sequence of the primary transcript contains a nucleotide sequence encoding a miPEP,
- modulation of the accumulation of said microRNA in the presence of said peptide with respect to accumulation of said microRNA in the absence of said peptide indicates the existence of a microRNA whose primary transcript contains a nucleotide sequence encoding a micropeptide.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a microRNA as defined above, in which the modulation of the accumulation of said microRNA is a decrease or a decrease. increasing the accumulation of said microRNA, in particular an increase.
- the subject of the application FR 13 60727 relates to a method for the detection and identification of a microRNA as defined above, in which the presence of said peptide in the cell results:
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a microRNA as defined above, in which the said open reading frame of step a) is contained in the 5 'or 3' portion of said primary microRNA transcript, preferably in the 5 'portion.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a microRNA as defined above, wherein said microRNA is present in a wild plant cell.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a microRNA as defined above, in which said eukaryotic cell, and said eukaryotic cell of the same type as the said determined eukaryotic cell, used in step b) are plant cells, preferably Medicago truncatula cells.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a microRNA as defined above, wherein said microRNA is of endogenous origin in said eukaryotic cell and in said eukaryotic cell of the same type as the above determined eukaryotic cell, used in step b).
- the subject of the application FR 13 60727 relates to a method for the detection and identification of a microRNA as defined above in which said microRNA is of exogenous origin in said eukaryotic cell and in said eukaryotic cell of the same type as the above determined eukaryotic cell, used in step b), said eukaryotic cells containing a vector for the expression of said microRNA.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a microRNA as defined above, in which the acceleration of said microRNA is determined by implementing a quantitative RT-PCR or a Northern blot.
- the subject of the application FR 13 60727 relates to a method for detecting and identifying a microRNA as defined above, in which the accumulation of said microRNA is determined by implementing a chip DNA or RNA.
- the subject of the application FR 13 60727 relates to a miPEP as obtained by the implementation of the method as defined above.
- Another aspect of the subject of the application FR 13 60727 also relates to a miPEP of 4 to 100 amino acids, preferably 4 to 40 amino acids, encoded by a nucleotide sequence contained in the primary transcript of a microRNA, said miPEP being able to modulate the accumulation of said microRNA in a eukaryotic cell.
- miORFS can be identified on the primary transcript of a microRNA, indicating that a primary microRNA transcript can potentially encode several miPEPs.
- miPEP effect of a miPEP is generally specific to a single microRNA, namely that resulting from the primary transcript encoding said miPEP.
- the subject of the application FR 13 60727 relates to a miPEP as defined above, said nucleotide sequence being contained in the 5 'or 3' portion of said primary transcript of a microRNA, preferably in the part 5 '.
- the subject of the application FR 13 60727 relates to a miPEP as defined above, said nucleotide sequence corresponding to the first open reading frame present on said primary transcript of a microRNA. In one embodiment, the subject of the application FR 13 60727 relates to a miPEP as defined above, said miPEP having a basic isoelectric point, preferably greater than 8. In another aspect, the subject of the application FR 13 60727 relates to a nucleic acid molecule encoding a miPEP as defined above.
- the subject of the application FR 13 60727 relates to a vector comprising at least one nucleic acid molecule as defined above.
- the subject of the application FR 13 60727 also relates to the use of at least:
- a determined eukaryotic cell capable of expressing a microRNA, the primary transcript of which contains at least one nucleotide sequence encoding said at least one miPEP and whose accumulation is modulated by said at least one miPEP,
- the subject of the application FR 13 60727 also relates to the use of at least:
- miPEP of 4 to 100 amino acids, preferably 4 to 40 amino acids, encoded by a nucleotide sequence contained in the primary transcript of a microRNA, said miPEP being capable of modulating the accumulation of said microRNA in a eukaryotic cell,
- a determined eukaryotic cell capable of expressing a microRNA, the primary transcript of which contains at least one nucleotide sequence encoding said at least one miPEP and whose accumulation is modulated by said at least one miPEP,
- the subject of the application FR 13 60727 is based on the surprising observation made by the inventors that it is possible to modulate the expression of one or more target genes of the same microRNA by modulating the accumulation of said microRNA to using a miPEP.
- the ob and the application FR 13 60727 relates to the use as defined above wherein said determined eukaryotic cell is a plant cell.
- the subject of the application FR 13 60727 relates to the use as defined above in which said microRNA and said gene are of endogenous origin in said determined eukaryotic cell.
- the subject of the application FR 13 60727 relates to the use as defined above in which said microRNA and said gene are of exogenous origin in said determined eukaryotic cell, said determined eukaryotic cell containing at least a vector allowing expression of said microRNA and said gene.
- endogenous origin indicates that the microRNA and / or the gene may be present naturally in the cell in question. Artificially, other copies of the microRNA and / or endogenous gene of origin can nevertheless be added to the cell in question, for example by cloning.
- exogenous origin indicates that the microRNA and / or the gene are never naturally present in the cell in question. It is a microRNA and / or a gene identified in another cell type or in an organism of another species, this microRNA and / or this gene are therefore necessarily introduced artificially into the cell in question.
- a genetically transformed cell may therefore contain 2 groups of microRNAs and / or genes potentially similar in terms of sequence, one of endogenous origin and the other of exogenous origin.
- the subject of the application FR 13 60727 relates to a method for modulating the expression of a gene regulated by a microRNA in a eukaryotic cell,
- said miPEP having:
- acclimation of said miPEP in said eukaryotic cell induces a modulation of the expression of said gene with respect to the expression of said gene without accumulation of said miPEP.
- the subject of the application FR 13 60727 relates to a method of modulating the expression of a gene as defined above, in which the accumulation of said miPEP in the cell results:
- the subject of the application FR 13 60727 relates to a method of modulating the expression of a gene as defined above in which said eukaryotic cell is a plant cell.
- the subject of the application FR 13 60727 relates to a method for modulating the expression of a gene as defined above in which said microRNA and said gene are of endogenous origin in said eukaryotic cell. .
- the subject of the application FR 13 60727 relates to a method for modulating the expression of a gene as defined above in which said microRNA and said gene are of exogenous origin in said eukaryotic cell.
- said eukaryotic cell containing at least one vector allowing expression of said microRNA and said gene.
- the subject of the application FR 13 60727 relates to a modified eukaryotic cell containing a peptide identical to a miPEP as defined above, which peptide is present in said eukaryotic cell independently of the transcription of the primary transcript of the microRNA. carrying the nucleotide sequence encoding said miPEP.
- modified eukaryotic cell means that said eukaryotic cell contains a miPEP introduced artificially into the cell, either as a peptide, or via a vector encoding said miPEP.
- the subject of the application FR 13 60727 relates to a modified eukaryotic cell as defined above, wherein said microRNA is of endogenous origin. In another embodiment, the subject of the application FR 13 60727 relates to a modified eukaryotic cell as defined above in which said microRNA is of exogenous origin, said modified eukaryotic cell containing a vector allowing expression of said microRNA. . In one embodiment, the subject of the application FR 13 60727 relates to a modified eukaryotic cell as defined above, said cell being a plant cell. In another aspect, the subject of the application FR 13 60727 relates to a plant comprising at least one modified eukaryotic cell as defined above. In another aspect, the subject of the application FR 13 60727 relates to a composition comprising at least:
- the subject of the application FR 13 60727 relates to a pesticidal composition
- a pesticidal composition comprising at least:
- nucleic acid encoding said miPEP, or a vector containing said nucleic acid.
- the subject of the application FR 13 60727 relates to a phytopharmaceutical composition
- a phytopharmaceutical composition comprising at least:
- the subject of the application FR 13 60727 relates to an eliciting composition
- an eliciting composition comprising at least:
- eliciting composition denotes a composition capable of conferring on the plant a better aptitude for symbiosis or better resistance to different stresses, whether of thermal, water or chemical nature.
- the subject of the application FR 13 60727 also relates to compositions acting on growth (inhibition of growth or on the contrary growth increase) and physiology (better ability to mycorrhizer, nodulate, better tolerance to different stress ) of the plant.
- the subject of the application FR 13 60727 relates to a herbicidal composition
- a herbicidal composition comprising at least:
- the subject of the application FR 13 60727 relates to an insecticidal composition
- an insecticidal composition comprising at least:
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, as a herbicide for eliminating plants or slowing down their growth, preferably as a herbicide. specific to a species or genus of plants.
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, as a phytopharmaceutical agent,
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, for modulating the physiological parameters of a plant, in particular the biomass, the leaf surface, or the caliber of the fruit.
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, for the lighting of orchards in order to increase the size of the fruit.
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, for the production and / or selection of plant seeds, said composition being used to control parthenocarpy or the monoecie of a plant.
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, said composition being administered to said plant by the foliar pathway or by the root pathway. In one embodiment, the subject of the application FR 13 60727 relates to the use of a composition as defined above, for the production and / or selection of plant seeds. In one embodiment, the subject of the application FR 13 60727 relates to the use of a composition as defined above, in which said composition is used to modify the physiological parameters of said plant seeds, in particular implantation. rooting, germination and resistance to water stress. In one embodiment, the subject of the application FR 13 60727 relates to the use of a composition as defined above, wherein said composition is applied by coating or filming on said plant seeds.
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, as a pesticide, for eliminating plant pests or likely to be classified as such,
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, as an insecticide. In one embodiment, the subject of the application FR 13 60727 relates to the use of a composition as defined above, for eliminating insect pests.
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, for eliminating animal species classified harmful or likely to be classified as such, in particular muridae. , especially the rat.
- the subject of the application FR 13 60727 relates to the use of a composition as defined above, to which said composition is applied to a plant to protect it from insect pests.
- a composition as defined above to which said composition is applied to a plant to protect it from insect pests.
- FIGURE 1 Effects of miPEP164a treatment on miR164a expression in A. thaliana.
- the photographs represent the results of a Northern blot analysis of the accumulation of miR164a in roots treated with water (control, left-hand photograph) or with 0.1 ⁇ l of a synthetic peptide, having identical sequence to that of miPEP164a, dissolved in water (0.1 ⁇ miPEP164a).
- U6 RNA is used as a load control to quantify the amount of miRl 64a.
- FIGURE 2 Effects of treatment with miPEP164a on Arabidopsis thaliana growth.
- the photographs show two plants (top views and side views) after 3 weeks of growth: a control plant watered and sprayed with water (A) and a plant aixosed and sprayed with a composition of 0.1 ⁇ of peptide synthetic whose sequence is identical miPEP164a (B). Watering Arabidopsis thaliana plants with miPEP164a significantly increases plant growth.
- FIGURE 3 Effects of treatment with miPEP164a on flowering date in Arabidopsis thaliana
- FIGURE 4 Effects of treatment with miPEP164a on flowering date in Arabidopsis thaliana
- the y-axis indicates the number of days after germination at the flowering date in a plant treated with water (left bar) or with a composition containing 1 ⁇ of miPEP164a (middle bar) and 1 ⁇ from miPEP165a (right bar).
- FIGURE 5 Effects of a treatment with miPEP164a on the size of flower stalks in Arabidopsis thaliana
- the y-axis indicates the height of the flower stalk in a plant treated with water (left bar) or with a composition containing 0.1 ⁇ of miPEP164a (right bar).
- FIGURE 6 Effects of a treatment with miPEP164a on the number of flowers in Arabidopsis thaliana
- the y-axis indicates the number of flowers after 39 days of culture in a plant treated with water (left bar) or with a composition containing 0.1 ⁇ of miPEP164a (right bar).
- FIGURE 7 Effects of the overexpression of the Atomic EPP319a on the expression of AtmiR319a in thaliana.
- the y-axis indicates the relative expression of AtmiR319a in a control plant (left column) or in a plant in which AtmiPEP319a is overexpressed (right column).
- FIGURE 8 Effects of treatment with miPEP319a on Arabidopsis thaliana growth.
- the photographs show two plants (top views and side views) after 3 weeks of growth: a control plant watered and sprayed with water (A) and a plant sprayed and sprayed with a composition of 0.1 ⁇ of peptide synthetic whose sequence is identical miPEP319a (B). Watering Arabidopsis thaliana plants with miPEP319a significantly increases plant growth.
- ORFS were searched in RACE-PCR data (Xie et al., Plant Physio ⁇ , 138: 2145-54, 2005), in which the sequences of the 5 'end of the pri-miR 50 miRs of A. Thaliana is available.
- ORFs capable of coding peptides of 4 to 59 amino acids have been identified in each of the pri-miRs, and in particular a miORF, identified on the pri-miR of miR164a, capable of encoding a peptide miPEP 164a.
- A. thaliana Col-0 plants are grown on MS base medium supplemented with 10 g / l of sucrose.
- Peptides were synthesized by Smartox and dissolved in water. Northern blot
- RNA was loaded on 15% PAGE gel and transferred to a nylon membrane (HybondNX, Amersham). The RNA was hybridized with a radiolabeled end-labeled oligonucleotide probe to detect U6 RNA or miR164a.
- Hybridizations were performed at 55 ° C.
- the hybridization signals were quantified using a phophorimager (Fuji) and normalized with the U6 RNA specific probe signal.
- Watering was carried out every 2-3 days with water for the control plants and with water containing 0.1 ⁇ or 1 ⁇ l of synthetic peptide (whose sequence is identical to miPEP164a or to miPEP165a) for test plants.
- ORFS were sought in the RACE-PCR data (Xie et al ⁇ Plant Physiol, 138:. 2145-54, ⁇
- ORFs capable of encoding peptides of 4 to 59 amino acids have been identified in each of the pri-miRs, and in particular a miORF, identified on the pri-miR of miR319a, capable of encoding a peptide miPEP319a.
- A. thaliana Col-0 plants are grown on MS base medium supplemented with 10 g / l of sucrose.
- the peptides were synthesized by Smartox and dissolved in 40% water / 50% acetonitrile / 10% (v / v / v) acetic acid solution.
- RNA was extracted using the Tri-Reagent Reagent (MRC) according to the manufacturer's instructions, except for the precipitation of RNA which was carried out with 3 volumes of ethanol.
- Reverse transcription of RNA was performed using the specific RTprimer rod loop primer in combination with hexamers to perform reverse transcription of high molecular weight RNA. Briefly, 1 ⁇ g of RNA was added to the specific loop stem primer (0.2 ⁇ ), the hexamere (500 ng), the RT (IX) buffer, the SuperScript Reverse transcriptase enzyme (SSIII) (a unit), dNTPs (0.2 mM each), DTT (0.8 mM) in a final reaction mixture of 25 ⁇ .
- MRC Tri-Reagent Reagent
- a pulsed reverse transcription reaction was performed (40 repetitions of the following cycle: 16 ° C for 2 minutes, 42 ° C for one minute and 50 ° C for one second, followed by a final inactivation of the reverse transcription to 85 ° C for 5 minutes).
- the DNA fragments of interest were amplified with Pfu polymerase (Promega).
- the DNA fragments were cloned for overexpression under the control of the strong 35S constitutive promoter according to the method described in Combier et al. (Genes & Dev, 22: 1549-1559, 200%).
- MiORF319a was cloned into pBB9 according to the method described in Combier et al (Genes & Dev, 22: 1549-1559, 200%).
- the watering was carried out every 2-3 days and the vaporization was carried out every day with water for the control plants and with water containing 0.1 ⁇ l of synthetic peptide (whose sequence is identical miPEP319a) for test plants.
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EP15774647.0A EP3152309B1 (fr) | 2014-06-03 | 2015-06-03 | Utilisation de micropeptides pour favoriser la croissance des plantes |
CA2950848A CA2950848C (fr) | 2014-06-03 | 2015-06-03 | Utilisation de micropeptides pour favoriser la croissance des plantes |
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US20170211080A1 (en) | 2017-07-27 |
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CA2950848A1 (fr) | 2015-12-10 |
CA2950848C (fr) | 2023-11-14 |
US10563214B2 (en) | 2020-02-18 |
EP3152309A1 (fr) | 2017-04-12 |
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